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The effect of attended color on the P1/N1 component of visual event-related potentials

Shu Omoto1, Yoshiyuki Kuroiwa, Chuanwei Wang

  • 1Department of Ophthalmology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Yokohama 236-0004, Japan.

Neuroscience Letters
|November 6, 2007
PubMed

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Color Vision01:24

Color Vision

Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
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Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.